LibWebView: Sort vendor-prefixed properties last in the inspector

Previously, the legacy `-webkit-foo` properties would all be top of the
list, when they are generally not useful to inspect. Instead, put them
at the bottom, so that users can still see them if they want to, but
they're not in the way.

Base/res/ladybird/inspector.js

@@ -204,7 +204,20 @@ inspector.createPropertyTables = (computedStyle, resolvedStyle, customProperties
         newTable.setAttribute("id", tableID);
 
         Object.keys(properties)
-            .sort()
+            .sort((a, b) => {
+                let baseResult = a.localeCompare(b);
+                // Manually move vendor-prefixed items after non-prefixed ones.
+                if (a[0] === "-") {
+                    if (b[0] === "-") {
+                        return baseResult;
+                    }
+                    return 1;
+                }
+                if (b[0] === "-") {
+                    return -1;
+                }
+                return baseResult;
+            })
             .forEach(name => {
                 let row = newTable.insertRow();